Portable air-brush plant



WITNESS C. A. MURPHY.

PORTABLE AIR BRUSH PLANT.

APPLICATION FILED MAY 22, 1919.

Patented July 27, 1920.

2 7p INVENTOR BY @m% A TTORNE YS UNITED STATES PATENT OFFICE.

CHARLES A. MURPHY, 0F OAKLAND, CALIFORNIA, ASSIGNOR OF ONE-HALF '10 FRANK A. 'IITTEMORE, OF RICHMOND, CALIFORNIA.

PORTABLE ArR-BnusH PLANT.

Specification of Letters Patent.

Patented July 27, 1920.

To all whom it may concern:

Be it known that I, CHARLES A. MURPHY, a citizen of the United States, residing at Oak land, in the county of Alameda and State of California, have invented certain new and useful Improvements in Portable Air-Brush Plants, of which the following is a specification.

Heretofore in the designing of 'what are commonly termed apparatus for applying coating materials, such as calcimine, paint and the like, the apparatuses have been constructed in the form of horse-drawn or motor driven vehicles or else have been in the form of cumbersome or complicated arrangements of tanks and pumps adapted for carrying on the back of the worlnnan who operates the device to apply the material. All of these portable devices are extremely heavy and diflicult to operate and the work performed by these devices entail considerable expense in the construction and operation threof, and they are not adapted for use on small jobs, as the cost of operation thereof is prohibitive where but little work is required.

One of the principal objects of the present invention is to provide an air brush plant of diminutive size which is capable of being readily transported in a satchel or hand bag, and which is adapted for setting up for operation in any place where a small amount of work is required to be done, or, in fact, where a large amount of work is necessary; the device consisting of but very few, parts which are light in weight, easily transported and can be manufactured at very little cost, thus enabling one with small capital to construct an apparatus and perform work which has only been possible by the use of a more cumbersome and costly apparatus now universally in use.

The invention has for its principal objects to provide a suitable air pump operated preferably by a small electric motor, and which is connected through a flexible hose or connection with any of the conventional forms of air brushes now on the market, the brush being attached preferably to the discharge end of the hose and having associated therewith a small receptacle for containing the liquid to be applied, there being positioned in the hose adjacent the point of its attachment to the air brush, a condensation receiver and separator, which is capable of being readily carried by the operator.

With the above mentioned and other objects in view, the invention consists in the novel construction and combinationof parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claims hereto appended; it being understood-that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention, reference is directed to the accompanying drawings, wherein-a Figure l illustrates a view in elevationof the preferred embodiment of my invention.

Fig. 2 is a broken sectional view in detail of the preferred form of a condensation separator.

Referring more particularly to the drawings, wherein like characters of reference designate corresponding parts-1 indicates a suitable portable base on which rests a small electric motor 2, the armature shaft 3 thereof being connected by a gear 4 with another gear 5 secured to the shaft 6 of a suitable air compressor 7. In the illustration, the air compressor is of the four-cylinder type, each cylinder having an air inlet valve 8 and discharging into an exhaust channel 9 in which is preferably mounted a. pressure gage 10.

.To the discharge end of the exhaust channel 9 is attached a suitable form of oilseparating or filtering apparatus 11, which is adapted to trap any lubrication which may be forced from the interior of the compressor into the exhaust channel 9 by'the operation of'the compressor pistons, thus preventing the oil from passing into the hose or flexible connection hereinafter described.

Connected to the discharge end of the separator 11, through a suitable coupling 12, is one end of a flexible hose or connection 13, of any suitable length, the outer end of which is attached through a suitable connection 14; with a conventional form of air brush A, the form illustrated comprising a handle 15 into which the connection 14 leads, said handle being provided with a regulating valve 14 for controlling the air volume to be discharged from the hose 13 through the nozzle 17.

The nozzle 17 is preferably carried on the surface of the plate 18, which is attached to a suitable container 19 and forms a closure therefor. The plate or cover 18 is provided with a siphon opening 20 which terminates adjacent the discharge end of the nozzle 17, whereby the air discharged from said nozzle will. withdraw the liquid from the chamber or receptacle 19 and project the same in the form of a spray, which is applied by the air force to the surface to be coated.

It will be apparent that on the operation of the motor, the air compressed by the compressor 7 is forced through the flexible hose 13 and the operator in applying the fluid is merely required to move the air brush A over the surface to be coated, this air brush being of comparatively light weight, is easily handled and the flexible hose permits of the ready moving of the same over the surface to be coated.

Inter-posed in the hose 13, adjacent the coupling 14 and adapted to be carried by the operator, is a small tank or trap 21, into which the air passing through the hose is discharged, said member carrying a deflector plate 22 into which leads the pipe 23 forming a portion of the connection 24, by which one portion of the hose is connected to one end of the member 21, the other portion of the hose being detachably connected to the opposite end of the member 21 by a coupling 25. Should any condensation take place in the air while the same is passing through the hose, the same is trapped in the base of the member 21 and is capable of being withdrawn therefrom by the opening of the outlet valve 26 in the base thereof.

A safety valve or pressure relief member 9 of any well known type capable of opening on the accumulation of any predetermined pressure in the hose 13 is provided preferably Within the channel 9, said member 9 enabling a uniform pressure to be maintained within the air hose without the employment of a tank or accumulating chamber and at the same time preventing the bursting of the hose by any undue pressure therein.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is 1. A portable air brush plant comprising a unit consisting of a portable base and an interconnected electric motor and air compressor carried thereby, a flexible hose connected at one end with said compressor for conducting air under pressure therefrom,

'and a second unit consisting of a portable air brush and receptacle for containing the material to be sprayed attached to the other end of said flexible connection, said flexible connection permitting the ready moving of one of said units independently of the other.

2. A portable air brush plant comprising a portable base and an interconnected electric motor and air compressor carried thereby, a flexible connection leading from said compressor for conducting air under pressure therefrom, an oil separator and a water separator interposed within said flexible connection, said water separator being positioned adjacent the discharge end of said flexible connection, and a portable air brush and fluid receptacle attached to the terminal end of said flexible connection, said flexible connection permitting the movement of said base and associated elements, and said brush, receptacle and water separator independently of each other.

3. A portable air brush plant comprising a portable base and an interconnected electric motor and air compressor carried thereby, a portable air brush, a flexible hose connected at one end with said compressor and at its terminal free end with said air brush for conducting air under pressure from the compressor to the air brush, and a receptacle carried by the air brush and movable as a unit therewith for containing the material to be sprayed, said flexible connection permitting the ready moving of said base and associated elements and said receptacle and its mounting elements independently of each other.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES A. MURPHY.

lVitnesses S. CONSTINE, D. B. RICHARDS. 

